Results 31 to 40 of about 17,679,315 (300)

Compact Stars in low-mass X-ray binaries

, 2014
We propose a model for compact stars in low-mass X-ray binaries(LMXBs) namely KS 1731-260, EXO 1745-248 and 4U 1608-52. Here we investigate the physical phenomena of a compact star in the LMXBs. Using our model, we have calculated central density, surface density, mass(M) and red-shift for the above mentioned compact stars, which is very much ...
Hossein, Sk. Monowar, Molla, Sajahan, Jafry, Md. Abdul Kayum, Kalam, Mehedi   +3 more
openaire   +2 more sources

NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts

The Astrophysical Journal, 2023
We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September.
Z. Funda Bostancı, Tuğba Boztepe, Tolga Güver, Tod E. Strohmayer, Yuri Cavecchi, Ersin Göğüş, Diego Altamirano, Peter Bult, Deepto Chakrabarty, Sebastien Guillot, Gaurava K. Jaisawal, Christian Malacaria, Giulio C. Mancuso, Andrea Sanna, Jean H. Swank   +14 more
doaj   +1 more source

MeerKAT radio observations of the neutron star low-mass X-ray binary Cen X-4 at low accretion rates [PDF]

, 2022
Centaurus X-4 (Cen X-4) is a relatively nearby neutron star low-mass X-ray binary that showed outbursts in 1969 and 1979, but has not shown a full outburst since.
Carotenuto, F., Miller-Jones, J. C. A., Russell, T. D., Saikia, P., Sivakoff, G. R., Eijnden, J. van den, Fender, R.   +6 more
core   +1 more source

Accreting Neutron Stars in Low-Mass X-Ray Binary Systems [PDF]

, 2008
22 pages, 7 figures, updated list of sources and references, to appear in "Short-period Binary Stars: Observation, Analyses, and Results", eds. E.F. Milone, D.A. Leahy, and D. Hobill (Dordrecht: Springer, http://www.springerlink.com)
Lamb, Frederick K., Boutloukos, Stratos
openaire   +2 more sources

XMM-Newton X-ray study of early type stars in the Carina OB1 association [PDF]

, 2007
<p><b>Aims:</b> X-ray properties of the stellar population in the Carina OB1 association are examined with special emphasis on early-type stars.
I. I. Antokhin, J. C. Brown, Rauw, G., G. Rauw, J.-M. Vreux, Antokhin, I. I., Antokhin, I.I., Brown, J.C., van der Hucht, K.A., Rauw, Grégor, K. A. van der Hucht, Vreux, Jean-Marie, Vreux, J.M., van der Hucht, K. A., Brown, J. C.   +14 more
core   +1 more source

X-Rays in Cepheids: Identifying Low-mass Companions of Intermediate-mass Stars

, 2022
International audienceX-ray observations have been made of a sample of 20 classical Cepheids, including two new observations (Polaris and l Car) reported here. The occurrence of X-ray flux around the pulsation cycle is discussed.
Moschou, S., Neilson, H., Evans, Nancy Remage, Drake, J.J., Moe, Maxwell, Guinan, E., Marengo, M., Winston, E.M., Wolk, Scott, Günther, H.M., Moe, M., Kervella, P., Neilson, Hilding, Kervella, Pierre, Engle, Scott, Engle, S., Drake, Jeremy J., Breuval, L., Matthews, L.D., Breuval, Louise, Pillitteri, Ignazio, Moschou, Sofia, Evans, N.R., Günther, H. Moritz, Marengo, Massimo, Pillitteri, I., Guinan, Edward, Wolk, S., Winston, Elaine M., Matthews, Lynn D.   +29 more
core   +1 more source

Widely separated binary systems of very low-mass stars

, 2005
In this paper we review some recent detections of wide binary brown dwarf systems and discuss them in the context of the multiplicity properties of very low-mass stars and brown ...
Phan-Bao, N., Reylé, C., Martín, E. L.
core   +2 more sources

Hard X-ray colours of neutron star and black hole low mass X-ray binaries with INTEGRAL [PDF]

Advances in Space Research, 2007
Paper from poster presentation at COSPAR meeting, Beijing, 2006.
Paltani, Stéphane, Courvoisier, Thierry, Parmar, Arvind, Parmar, Arvind, Shaw, Simon, Paizis, Ada, Shaw, Simon, Mowlavi, Nami, Paltani, Stephane, Courvoisier, Thierry, Paizis, Ada, Mowlavi, Nami   +11 more
openaire   +2 more sources

Polarization properties of weakly magnetized neutron stars in low-mass X-ray binaries

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT X-ray polarimetry missions like Imaging X-ray Polarimetry Explorer will be able to measure for the first time the polarization properties of accreting, weakly magnetized neutron stars in low-mass X-ray binaries. In this work, we present simulations of the expected X-ray polarized signal, including the coronal emission for ...
A Gnarini, F Ursini, G Matt, S Bianchi, F Capitanio, M Cocchi, R Farinelli, W Zhang   +7 more
openaire   +3 more sources

Isotropic star in low-mass X-ray binaries and X-ray pulsars

, 2014
We present a model for compact stars in the low mass X-ray binaries(LMXBs) and X-ray pulsars using a metric given by John J. Matese and Patrick G. Whitman \citep{Matese and Whitman1980}. Here the field equations are reduced to a system of two algebraic equations considering the isotropic pressure.
Kalam, Mehedi, Hossein, Sk. Monowar, Molla, Sajahan   +2 more
openaire   +2 more sources